JPH0313963Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a thin storage battery.

Conventional technologies and their problems Conventional storage batteries such as lead-acid batteries and alkaline batteries have a structure in which one or more positive electrode plates, separators, and negative electrode plates are stacked one on top of the other in a case, and an electrolyte is injected into the case. It has a structure in which band-shaped positive and negative electrode plates and separators are stacked, then spirally wound, loaded into a case, and electrolyte is injected.
Therefore, the thickness of the storage battery is the sum of the thicknesses of the positive electrode plate, negative electrode plate, separator, and battery case used, and it is structurally impossible to obtain a storage battery with a thickness less than this value. However, in recent years, as devices using storage batteries have become smaller, there has been a strong demand for thinner storage batteries, but the above-mentioned structure has already reached its limit in terms of thinner storage batteries.

Means for Solving Problems The present invention relates to a new structure that enables the production of thin batteries, in which the positive electrode plate, separator, and negative electrode plate are connected to the cell 12 and the battery case 4 instead of being stacked one above the other. A thin storage battery having conductors 6 and 7, the cell 12 has a positive electrode block 1 and a negative electrode block 2.
and a separator block 3 are arranged adjacent to each other in the plane direction. , 11 are formed on the outer wall, and a desired number of cells 12 are arranged and housed adjacent to each other in the surface direction in the battery case 4, and the positive electrode block 1 and the negative electrode block 2 are connected to each other. The connecting conductors 6 and 7 are led out from the small hole 5 of the battery case 4 and connected to the output terminals 10 and 11.
Alternatively, by connecting to the thin metal 8 and sealing the small hole 5 with a synthetic resin, a thin storage battery having a thickness equal to the sum of the thickness of one electrode plate and the thickness of the battery case wall is obtained.

Example The present invention will be explained in detail below.

FIG. 1 is a partially cutaway view of a side wall of a battery case of an embodiment of a storage battery according to the present invention, and FIG. 2 is a diagram showing cells accommodated in the storage battery according to the present invention. In the figure, 1 is the positive electrode block, 2 is the negative electrode block, and 3 is the positive electrode block.
are separator blocks, each with a thickness of 1.5mm.
It is said that 4 is a battery case, and a small hole 5 is provided on the side thereof. The connecting conductor 6 extending from the positive electrode plate 1 and the current collecting lead wire (current collector) 7 extending from the negative electrode plate 2 are exposed through the small hole. Thereafter, the connecting conductors 6 and 7 are bent approximately 90 degrees, and the small holes and bent portions are sealed with a thermosetting resin such as epoxy resin to prevent leakage of liquid and intake of outside air. The tip of the bent connection conductor is soldered to a metal foil 8 printed in a predetermined pattern on the outer surface of the battery case 4 in advance. The metal foil is bonded to another plate, lead wire, terminal, etc.
It has the function of a lead wire or a connecting wire. With this structure, the positive electrode block, negative electrode block, and separator block having the same thickness are arranged on the same plane, so in this example, the thickness of the electrode plate block etc. is 1.5 mm.
If the thickness of the battery case is 1mm, the thickness of the battery is 1.5
x 1 x 2 = 3.5 mm, making it possible to manufacture extremely thin lead-acid batteries, which was previously considered impossible. In addition, since it is only necessary to solder the connecting conductor of each plate block to the metal foil printed on the side wall of the battery case, current can be freely drawn from any direction and from any position, and the lead wire can be drawn from any direction and from any position. Since there is no need to arrange the parts, the number of man-hours required for manufacturing is also greatly reduced.

FIG. 3 is a diagram showing a sealed storage battery according to another embodiment of the present invention, in which the same reference numerals as in FIG. 1 indicate the same parts.

Here, a plate with a connecting conductor extending perpendicularly to the plate block is used, and after exposing the connecting conductor to the outside through a small hole 5 provided in the front of the battery case, the same as in the previous embodiment is used. Solder the tip and seal the small hole. In this example, a metal foil is printed on the front of the battery case and a thermal protector 9 is provided to improve the safety of the storage battery. In addition, when manufacturing batteries with different capacities, all you need to do is increase or decrease the number of electrode plates to be incorporated.
There is no need to prepare electrode plates depending on the battery capacity as in the past, so there are fewer types of parts.
Cost reduction becomes possible.

Effects of the Invention As described above, the storage battery with the new structure of the present invention allows for an extremely thin shape that was previously impossible, so it is ideal for portable equipment etc. where installation locations are limited. The industrial value is enormous.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view of the side wall of a storage battery according to an embodiment of the present invention. In this embodiment, two cells are arranged and housed. FIG. 2 is a diagram showing cells accommodated in the storage battery according to the present invention. FIG. 3 is a partially cutaway view of a side wall of a storage battery according to another embodiment of the present invention. 1... Positive electrode block, 2... Negative electrode block, 3
... Separator block, 4 ... Battery case, 5 ... Small hole, 6, 7 ... Connection conductor, 8 ... Metal foil, 9 ...
Thermal protector, 10, 11...output terminal,
12...Cell.

Claims (1)

[Claims for Utility Model Registration] A thin storage battery having a cell 12, a battery case 4, and connecting conductors 6 and 7, wherein the cell 12 has a positive electrode block 1 and a negative electrode block 2.
and a separator block 3 are arranged adjacent to each other in the plane direction.
A metal foil 8 connected to terminals 0 and 11 is formed on the outer wall, and a desired number of cells 12 are arranged and housed adjacent to each other in the surface direction in the battery case 4, and a positive electrode block 1 and a negative electrode block 2 are connected to each other. The connecting conductors 6 and 7 led out from the battery case 4 are pulled out from the small hole 5 of the battery case 4 and connected to the output terminals 10 and 11.
Or a thin storage battery connected to metal foil 8 and having small holes 5 sealed with synthetic resin.